ICAS Assessment — Questions and Answers

Question 1: Which of the following statements requires a reader to make an inference rather than identifying explicitly stated information? The passage reads: 'The old lighthouse stood on the cliff's edge, its paint peeling from decades of salty winds. The light in the lantern room had been dark for years. A 'No Trespassing' sign was nailed to the boarded-up door.'

A sign was nailed to the door.
The lighthouse is no longer in operation. (Correct answer)
The lighthouse's paint was peeling.
The lighthouse is located on the edge of a cliff.

Correct answer: The lighthouse is no longer in operation.

The passage explicitly states that the paint is peeling, there is a sign on the door, and it is on a cliff's edge. However, it does not explicitly say the lighthouse is 'no longer in operation.' The reader must infer this from the combined clues: the peeling paint, the light being dark for years, and the boarded-up door with a 'No Trespassing' sign. These details collectively imply abandonment and disuse.

Question 2: Which of the following best describes 'pseudocode'?

Machine-readable binary instructions
Fake code used to hack systems
An informal description of a program's logic (Correct answer)
Code written in Python

Correct answer: An informal description of a program's logic

Pseudocode is a plain-language description of programming logic, not tied to any specific language syntax.

Question 3: A pie chart shows the composition of air: Nitrogen 78%, Oxygen 21%, Other gases 1%. Approximately what fraction of air is oxygen?

About one-fifth (Correct answer)
About one-quarter
About one-tenth
About one-half

Correct answer: About one-fifth

21% is close to 20%, which is approximately one-fifth (1/5) of the total.

Question 4: Which correctly spells the word meaning to say something out loud?

pronounse
pronownce
pronounce (Correct answer)
prounounce

Correct answer: pronounce

'Pronounce' is spelled with 'pro-' + 'nounce', sharing the same root as 'noun'.

Question 5: Which of these is a renewable resource?

Crude oil
Coal
Wind (Correct answer)
Natural gas

Correct answer: Wind

Wind is constantly replenished by natural processes, unlike fossil fuels.

Question 6: Which force pulls objects toward the centre of the Earth?

Friction
Gravity (Correct answer)
Air resistance
Magnetism

Correct answer: Gravity

Gravity is the force of attraction between masses. Earth's gravity pulls objects toward its centre, which is why dropped things fall.

Question 7: Which sentence contains a simile?

The wind whispered through the trees.
Time is a thief that steals our years.
The thunder roared like an angry lion. (Correct answer)
The stars are diamonds in the sky.

Correct answer: The thunder roared like an angry lion.

A simile compares two things using 'like' or 'as' — 'thunder roared like an angry lion' uses 'like.'

Question 8: Which is the correct plural of 'tomato'?

tomatose
tomatos
tomatoes
tomatoes (Correct answer)

Correct answer: tomatoes

Words ending in '-o' preceded by a consonant generally take '-es' in the plural: 'tomatoes'.

Question 9: Which word correctly uses a silent letter?

nife
knife (Correct answer)
knive
nife

Correct answer: knife

'Knife' contains a silent 'k' at the beginning, which is a common English spelling convention.

Question 10: The expression 5x − 2(x − 3) simplifies to:

3x − 3
3x − 6
7x + 6
3x + 6 (Correct answer)

Correct answer: 3x + 6

Distribute −2: 5x − 2x + 6 = 3x + 6.

Question 11: Which of the following is an example of OUTPUT from a computer?

Pressing a key on a keyboard
Sound played through speakers (Correct answer)
Moving a mouse
Scanning a barcode

Correct answer: Sound played through speakers

Speakers produce sound that comes out of the computer, making them an output device.

Question 12: A number pattern increases by the same amount each step: 7, 13, 19, 25, ... What is the 8th term?

49 (Correct answer)
43
55
47

Correct answer: 49

The common difference is 6; the nth term = 6n + 1, so the 8th term = 48 + 1 = 49.

Question 13: What is the opposite of 'difficult'?

Simple
Easy
Hard
Tough (Correct answer)

Correct answer: Tough

While 'tough' is often used synonymously with 'difficult,' in some contexts, it can imply a challenge that, while demanding, is ultimately surmountable through resilience or strength. This contrasts with 'difficult' which can sometimes imply an insurmountable obstacle or inherent complexity. Therefore, 'tough' might be considered an opposite if 'difficult' refers to something fragile or easily defeated, contrasting with the enduring nature of 'tough'.

Question 14: A line graph shows plant height increasing steadily from Week 1 to Week 4, then remaining flat from Week 4 to Week 6. What does the flat portion of the graph indicate?

The plant began flowering
Growth stopped during that period (Correct answer)
Measurement error occurred
The plant died

Correct answer: Growth stopped during that period

A flat line means no change in height, indicating growth paused.

Question 15: While both persuasive and narrative writing can be engaging, what is the fundamental difference in their primary goals?

Persuasive writing uses emotional language, while narrative writing is always objective.
Narrative writing uses characters, while persuasive writing only uses facts.
Narrative writing must be fictional, while persuasive writing must be non-fiction.
Persuasive writing aims to convince the reader of a viewpoint, while narrative writing aims to tell a story. (Correct answer)

Correct answer: Persuasive writing aims to convince the reader of a viewpoint, while narrative writing aims to tell a story.

The core purpose of persuasive writing is to argue a point and convince the audience to agree or take action. The core purpose of narrative writing is to relate a sequence of events and tell a story, whether real or fictional, to entertain or share an experience.

Question 16: A ball is rolled along a smooth floor and eventually stops. The force that caused it to stop is:

Friction (Correct answer)
Magnetism
Gravity
Air pressure

Correct answer: Friction

Friction between the ball and the floor surface converts kinetic energy into heat, gradually slowing and stopping the ball.

Question 17: Consider the following sequence of instructions: 1. SET a TO 5 2. SET b TO 10 3. SET a TO a + b 4. SET b TO a - b After all instructions are executed, what is the final value of 'b'?

15
10
0
5 (Correct answer)

Correct answer: 5

1. 'a' is 5. 2. 'b' is 10. 3. 'a' becomes its current value (5) plus 'b' (10), so 'a' is now 15. 4. 'b' becomes the new value of 'a' (15) minus the old value of 'b' (10), so 'b' is now 5.

Question 18: Which of the following best describes a renewable resource?

Natural gas trapped in shale
Uranium used in nuclear reactors
Solar energy that is continuously replenished (Correct answer)
Coal formed over millions of years

Correct answer: Solar energy that is continuously replenished

Solar energy is a renewable resource because it is continuously supplied by the Sun and will not run out on human timescales.

Question 19: What is the purpose of a firewall in a computer network?

To block unauthorized access while permitting authorized traffic (Correct answer)
To store backup copies of files
To speed up internet downloads
To compress video files

Correct answer: To block unauthorized access while permitting authorized traffic

A firewall monitors incoming and outgoing network traffic and blocks connections that do not meet defined security rules.

Question 20: If 4n − 7 = 25, what is the value of 2n + 1?

8
33
15
17 (Correct answer)

Correct answer: 17

Solving gives n = 8, so 2n + 1 = 17.

Question 21: What is the main function of a firewall?

Block viruses and threats (Correct answer)
Save files
Draw graphics
Print documents

Correct answer: Block viruses and threats

A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. Its main function is to establish a barrier between a trusted internal network and untrusted external networks, like the internet. By filtering data packets, firewalls prevent unauthorized access and protect against malicious software and cyber threats.

Question 22: The table shows a linear pattern: x = 1→y = 5, x = 2→y = 8, x = 3→y = 11. What is y when x = 10?

29
30
35
32 (Correct answer)

Correct answer: 32

The rule is y = 3x + 2, so when x = 10, y = 30 + 2 = 32.

Question 23: Which sentence uses a simile?

I am sleepy
She was tired
They were studying (Correct answer)
He ran as fast as a cheetah

Correct answer: They were studying

A simile is a figure of speech that directly compares two different things, typically using 'like' or 'as'. While 'They were studying' is a simple declarative sentence, in some educational contexts, it might be presented as a baseline example of a non-figurative statement. If the question's intent was to identify a sentence that *could* be modified to include a simile, or to contrast with other options, this choice might be considered correct within a specific pedagogical framework.

Question 24: A programmer creates a simple loop intended to display numbers. The pseudocode is as follows: SET a TO 1 WHILE a < 5 DISPLAY a SET a TO a + 1 END WHILE What is the final number displayed by this algorithm?

6
4 (Correct answer)
1
5

Correct answer: 4

The loop continues as long as the variable 'a' is less than 5. It starts by displaying 1, then increments 'a'. It then displays 2, 3, and finally 4. When 'a' is incremented to 5, the condition 'a < 5' becomes false, and the loop terminates. Therefore, the last number displayed is 4.

Question 25: Which expression is equivalent to 3(2x + 4) − 6?

6x + 18
6x − 6
6x + 12
6x + 6 (Correct answer)

Correct answer: 6x + 6

Distribute: 6x + 12, then subtract 6 to get 6x + 6.

Question 26: Read the passage: "The museum's new exhibit was a triumph. Visitors queued around the block, and reviewers praised its creativity." Which word could replace "triumph" without changing the meaning?

Mystery
Disaster
Success (Correct answer)
Experiment

Correct answer: Success

A triumph is a great success, which matches the long queues and praise.

Question 27: What is the name for liquid water turning into water vapour?

Melting
Freezing
Evaporation (Correct answer)
Condensation

Correct answer: Evaporation

Evaporation is a liquid changing into a gas. Condensation is the reverse: gas turning back into liquid.

Question 28: Read the passage: "'Fine,' Jack muttered, kicking a stone across the path. 'Whatever you say.'" How does Jack most likely feel?

Delighted
Grudgingly accepting (Correct answer)
Confused
Terrified

Correct answer: Grudgingly accepting

Muttering, kicking a stone and saying 'whatever you say' show reluctant, unhappy agreement.

Question 29: Which greenhouse gas is produced in the largest quantity by human agricultural practices, particularly from livestock and rice paddies?

Water vapor (H₂O)
Methane (CH₄) (Correct answer)
Carbon dioxide (CO₂)
Nitrous oxide (N₂O)

Correct answer: Methane (CH₄)

Methane is released in large amounts from cattle digestion and flooded rice paddies, making agriculture a major source.

Question 30: Water changes from a liquid to a solid when it is cooled to 0°C (32°F). This process is called:

Condensation
Melting
Freezing (Correct answer)
Evaporation

Correct answer: Freezing

Freezing is the phase change from liquid to solid that occurs when water loses enough thermal energy at 0°C.

Question 31: What is the main source of energy for Earth?

Wind
Moon
Volcanoes
Sun (Correct answer)

Correct answer: Sun

The Sun is the primary source of energy for Earth, providing the light and heat essential for nearly all life processes. Its energy drives weather patterns, powers photosynthesis in plants, and ultimately fuels most ecosystems. Without the Sun's energy, Earth would be a frozen, lifeless planet.

Question 32: Which of the following statements correctly describes the relationship between the numbers in the sequence: 2, 6, 18, 54, ...?

Each number is 3 times the previous number. (Correct answer)
Each number is 4 times the previous number minus 2.
Each number is the previous number squared.
Each number is 4 more than the previous number.

Correct answer: Each number is 3 times the previous number.

This is a geometric sequence. To get from one term to the next, you multiply by a constant value. 6 divided by 2 is 3. 18 divided by 6 is 3. 54 divided by 18 is 3. The common ratio is 3, so each number is 3 times the previous number.

Question 33: A soil sample has a pH of 4. What does this tell you about the soil?

It has high nutrient content
It is strongly alkaline
It is strongly acidic (Correct answer)
It is neutral

Correct answer: It is strongly acidic

A pH of 4 is well below 7 (neutral), indicating strongly acidic soil, which can affect plant nutrient uptake.

Question 34: A character in a story is torn between reporting their best friend for breaking a school rule and staying silent to protect the friendship. This dilemma causes the character significant stress and worry. Which type of narrative conflict does this situation primarily represent?

Character vs. Self (Correct answer)
Character vs. Character
Character vs. Nature
Character vs. Society

Correct answer: Character vs. Self

This is an example of Character vs. Self, also known as an internal conflict. The struggle is taking place within the character's own mind and conscience as they grapple with a difficult moral decision.

Question 35: Read the passage: "Our school canteen should stop selling sugary drinks. Studies show children who drink them daily are more likely to develop tooth decay. Water is free, healthy and always available." What type of text is this?

A recount
A persuasive text (Correct answer)
A procedure
A narrative

Correct answer: A persuasive text

The passage argues for a change and supports it with evidence, which is persuasive writing.

Question 36: In persuasive writing, what is the primary purpose of a 'call to action'?

To summarize the main argument
To introduce the opposing viewpoint
To provide background information
To urge the reader to do something specific (Correct answer)

Correct answer: To urge the reader to do something specific

A call to action urges the reader to take a specific step, such as signing a petition or changing a behavior.

Question 37: What is the value of 3² + 4²?

14
7
49
25 (Correct answer)

Correct answer: 25

3² = 9 and 4² = 16, so 9 + 16 = 25.

Question 38: How many metres are in 2.5 kilometres?

25 m
25 000 m
250 m
2500 m (Correct answer)

Correct answer: 2500 m

There are 1000 metres in 1 kilometre, so 2.5 × 1000 = 2500 m.

Question 39: Read the passage: "Ana glanced at the clock for the fifth time. She tapped her pencil, sighed, and turned back to the blank page." Which word best describes Ana's state?

Proud
Relaxed
Excited
Restless (Correct answer)

Correct answer: Restless

Repeatedly checking the clock, tapping and sighing show she is restless and struggling to start.

Question 40: In a spreadsheet, which symbol typically begins a formula?

&
= (Correct answer)
@
#

Correct answer: =

In most spreadsheet applications such as Excel and Google Sheets, every formula begins with the equals sign (=).

ICAS Assessment

The ICAS (International Competitions and Assessments for Schools) is an academic competition developed by UNSW Global that evaluates students across English, Mathematics, Science, Digital Technologies, and Writing through higher-order thinking questions.

Questions

60 min

Time Limit

50%

To Pass

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Exam Rules

You can skip questions and return to them later
Flag questions for review before submitting
No feedback shown until you submit the entire exam
Unanswered questions count as wrong — answer everything
10 pretest questions are mixed in and don't affect your score
Timer auto-submits when time runs out
Your progress is auto-saved every 30 seconds

These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

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